UDF question

i have a question concerning interpreted UDFs. I have once intorduced a UDF to my model using the User Defined -> Functions -> Interpreted panel. However, I had to change the UDF afterwards with the name of the function. I compiled the new file, and the name of the older function is no longer available in the choice of functions, as expected.

During the solution process however, FLUENT reports that the old function can not be found. It still searchs for it, though there is nothing in the model that requests data from it. I opened also the CAS file with a text editor and saw really the name of my old function within.